LTU-AS is an Audio/Speech LLM trained on OpenASQA dataset.

This repository provides all the necessary tools to infer a speech llm using SpeechBrain. For more details please check the ltu-as paper.

For a better experience, we encourage you to learn more about SpeechBrain. The model performance is evaluated on 5 different tasks:

model	Emotion Recognition Iemocap (Acc)	ASR Librispeech test-clean (WER)	Audio Classification ESC-50 (Acc)	Age Prediction Voxceleb2-test (MAE)	Gender Classification Voxceleb2-test (F1)
original model in the paper	65.2%	4.9%	80.8%	7.3	90.8%
our model	69.5%	1.45% (with Whisper large v3)	76.6%	6.67	98.8%

Pipeline description

A whisper encoder together with a TLTR (time- and layer-wise transformer) is used as an audio encoder to encode acoustic embeddings.
For speech, an external ASR system is used to get the spoken texts such as whisper-large-v3 used here.
The spoken text is added into a user prompt then transformed to a text embedding. It is then concatenated with the acoustic embedding from the first step and fed to a fine-tuned Llama3.

Install SpeechBrain

First of all, please install the development version of SpeechBrain with the following command:

git clone https://github.com/speechbrain/speechbrain.git
cd speechbrain
pip install -r requirements.txt
pip install --editable .

Please notice that we encourage you to read our tutorials and learn more about SpeechBrain.

Extra-dependencies

transformers==4.34.0
tokenizers==0.14.1
huggingface-hub==0.24.5

Inference of LTU-AS

from speechbrain.inference.multimodal import LTU_AS
from transformers import AutoModelForSpeechSeq2Seq, AutoProcessor, pipeline

ltu_as = LTU_AS.from_hparams(
    source="speechbrain/speech-llm-LTU-AS-openasqa"
)

# whisper-large-v3 as ASR model, can be changed to any customised ASR model
device = "cuda:0" if torch.cuda.is_available() else "cpu"
torch_dtype = torch.float16 if torch.cuda.is_available() else torch.float32
model_id = "openai/whisper-large-v3"
model = AutoModelForSpeechSeq2Seq.from_pretrained(
    model_id, torch_dtype=torch_dtype, low_cpu_mem_usage=True, use_safetensors=True
)
model.to(device)

processor = AutoProcessor.from_pretrained(model_id)
pipe = pipeline(
    "automatic-speech-recognition",
    model=model,
    tokenizer=processor.tokenizer,
    feature_extractor=processor.feature_extractor,
    max_new_tokens=128,
    chunk_length_s=30,
    batch_size=16,
    return_timestamps=False,
    torch_dtype=torch_dtype,
    device=device,
)

# start an inference loop:
while True:
    audio_path = input("please enter the raw audio path : ")
    instruction = input("please enter the instruction : ")
    transcript = " " + pipe(audio_path)["text"]
    predicted_words = ltu_as.generate_with_raw_audio(audio_path, instruction, transcript)[0]
    print("\n")
    print(predicted_words)
    print("\n")

Inference on GPU

To perform inference on the GPU, add run_opts={"device":"cuda"} when calling the from_hparams method.

Training

The training information can be found here

You can find our training results (models, logs, etc) here.

Limitations

The SpeechBrain team does not provide any warranty on the performance achieved by this model when used on other datasets.

Citing LTU-AS

@inproceedings{gong_ltuas,
  title={Joint Audio and Speech Understanding},
  author={Gong, Yuan and Liu, Alexander H and Luo, Hongyin, and Karlinsky, Leonid and Glass, James},
  year={2023},
  booktitle={2023 IEEE Automatic Speech Recognition and Understanding Workshop (ASRU)},
}

Citing SpeechBrain

Please, cite SpeechBrain if you use it for your research or business.

@misc{speechbrain,
  title={{SpeechBrain}: A General-Purpose Speech Toolkit},
  author={Mirco Ravanelli and Titouan Parcollet and Peter Plantinga and Aku Rouhe and Samuele Cornell and Loren Lugosch and Cem Subakan and Nauman Dawalatabad and Abdelwahab Heba and Jianyuan Zhong and Ju-Chieh Chou and Sung-Lin Yeh and Szu-Wei Fu and Chien-Feng Liao and Elena Rastorgueva and François Grondin and William Aris and Hwidong Na and Yan Gao and Renato De Mori and Yoshua Bengio},
  year={2021},
  eprint={2106.04624},
  archivePrefix={arXiv},
  primaryClass={eess.AS},
  note={arXiv:2106.04624}
}

About SpeechBrain

Website: https://speechbrain.github.io/
Code: https://github.com/speechbrain/speechbrain/
HuggingFace: https://huggingface.co/speechbrain/